78401043 has 48 divisors (see below), whose sum is σ = 137419776. Its totient is φ = 42102720.

The previous prime is 78401027. The next prime is 78401047. The reversal of 78401043 is 34010487.

It is not a de Polignac number, because 78401043 - 2⁴ = 78401027 is a prime.

It is a super-2 number, since 2×78401043² = 12293447086975698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78400998 and 78401016.

It is not an unprimeable number, because it can be changed into a prime (78401047) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87946 + ... + 88832.

It is an arithmetic number, because the mean of its divisors is an integer number (2862912).

Almost surely, 2^78401043 is an apocalyptic number.

78401043 is a deficient number, since it is larger than the sum of its proper divisors (59018733).

78401043 is a wasteful number, since it uses less digits than its factorization.

78401043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 78401043 is about 8854.4363456970. The cubic root of 78401043 is about 427.9968901716.

The spelling of 78401043 in words is "seventy-eight million, four hundred one thousand, forty-three".